Linux's licensing allows modification and derivatives from everyone. There is...

Linux's licensing allows modification and derivatives from everyone. There is no "official" Linux operating system; rather, they just give away the parts for people to put together, include or not, or substitute; and multiple people have made their own Linux operating system with these parts and given it out publicly.
The most popular Linux operating system is Linux Mint Cinnamon Edition . The latest version of that is 17.3 "Rosa;" more info here, at it's website.